Abstract
By combing ZnO with the silicon hydroxyl in USY, a series of Cu/ZnO-USY catalysts with both acid and base sites were prepared with the precipitation method and used in the hydrogenolysis of glycerol to propanediol. The Cu/USY and Cu/ZnO catalysts were also prepared with the same method and used as blanks. These catalysts were fully characterized with TEM, SEM, BET, XRD, NH3-TPD, CO2-TPD and H2-TPR. The combination of ZnO with the surface silicon hydroxyl of USY generated new “core–shell like” structure and introduced base sites. This newly formed structure made the Cu particle (10 nm) highly dispersed on the catalyst and the acid–base co-operativity accelerated the glycerol dehydration and led to higher glycerol conversion and 1,3-propanediol (1,3-PDO) selectivity with much short time (5 h). Catalyst deactivation was also investigated, mainly caused by the increase of the Cu particle size during the hydrogenolysis process.
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The authors are grateful to the Natural Science Foundation of China (No. 20906013, No. 21276050, No. 21406034) for financial support.
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Niu, L., Wei, R., Li, C. et al. Cu/ZnO-USY: an efficient bifunctional catalyst for the hydrogenolysis of glycerol. Reac Kinet Mech Cat 115, 377–388 (2015). https://doi.org/10.1007/s11144-015-0838-z
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DOI: https://doi.org/10.1007/s11144-015-0838-z